
*{margin:0;padding:0;}
.box{
    width:100%;
    height:100%;
    background:red;
    position:fixed;
}
.nav{
    width:100%;
height:100%;
    font-size:50px;
    text-align:center;
    line-height:650px;
}
.dh{
    background: #000000;
    width:150px;
    height:255px;
    position:fixed;
    top:200px;
    left:30px;
}
.dh ul li {
    list-style: none;
    line-height: 50px;
    text-align: center;
    cursor: pointer;
    border-bottom: 1px solid red;
    color:white;
}
.dh ul li:hover{
    background: #0cd80e;
    transform:rotateY(60deg);
    transition:2s;
}
